EP 3812781 A1 20210428 - ESTIMATING A BATTERY STATE OF AN ELECTROCHEMICAL BATTERY

Title (en)

ESTIMATING A BATTERY STATE OF AN ELECTROCHEMICAL BATTERY

Title (de)

SCHÄTZUNG EINES BATTERIEZUSTANDS EINER ELEKTROCHEMISCHEN BATTERIE

Title (fr)

ESTIMATION DE L'ÉTAT D'UNE BATTERIE ÉLECTROCHIMIQUE

Publication

EP 3812781 A1 20210428 (EN)

Application

EP 19204753 A 20191023

Priority

EP 19204753 A 20191023

Abstract (en)

A computer-implemented method and a battery state estimating system for estimating a battery state of an electrochemical battery, including: weighting (S22) the electrical impedance measurements (10) of a provided series of electrical impedance measurements according to a weighting function that is dependent on the index (s) of the series or on the measurement frequency (f<sub>s</sub>), resulting in at least a series (21) of consecutive elements of the series of measurements (10), when point-to-point connected in the complex plane of the electrical impedance in a sequence according to the index (s) of the series of measurements (10), forming at least one loop (22) in the complex plane; calculating (S24) a measure of the size of the at least one loop (22) in the complex plane; determining (S26) an estimation of a battery state of the electrochemical battery (44) based on the calculated measure of the size of the at least one loop (22) in the complex plane; and outputting (S28) the estimation of the battery state.

IPC 8 full level

G01R 31/389 (2019.01)

CPC (source: CN EP US)

G01R 31/367 (2019.01 - CN US); G01R 31/378 (2019.01 - CN); G01R 31/385 (2019.01 - CN); G01R 31/387 (2019.01 - US); G01R 31/389 (2019.01 - CN EP); G01R 31/392 (2019.01 - US); G01R 31/367 (2019.01 - EP)

Citation (applicant)

WO 2005059579 A1 20050630 - LG CHEMICAL LTD [KR]
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US 4678998 A 19870707 - MURAMATSU KUNIHIRO [JP]
JP 2003249271 A 20030905 - AKUSON DATA MACHINE KK
JP 4038788 B2 20080130
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DE 112016002873 T5 20180308 - JAPAN AEROSPACE EXPLORATION [JP]
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DE 112016003789 T5 20180503 - MAZDA MOTOR [JP]
WO 2016080111 A1 20160526 - RITSUMEIKAN TRUST [JP]
DE 112015005201 T5 20170727 - RITSUMEIKAN TRUST [JP]
US 2013307487 A1 20131121 - MATTHE ROLAND [DE], et al
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WO 0016083 A1 20000323 - CHAMPLIN KEITH S [US]
EP 1129343 A1 20010905 - CHAMPLIN KEITH S [US]

Citation (search report)

[A] US 2011031048 A1 20110210 - OHKURA KAZUMI [JP]
[A] US 2005048336 A1 20050303 - TAKEBE YASUO [JP], et al
[A] US 2014222358 A1 20140807 - MORITA TOMOKAZU [JP], et al
[A] WO 2017047192 A1 20170323 - SUMITOMO ELECTRIC INDUSTRIES [JP]

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

Designated extension state (EPC)

BA ME

DOCDB simple family (publication)

EP 3812781 A1 20210428; EP 3812781 B1 20221130; CN 112698214 A 20210423; CN 112698214 B 20240319; US 11385296 B2 20220712; US 2021123981 A1 20210429

DOCDB simple family (application)

EP 19204753 A 20191023; CN 202011140739 A 20201022; US 202017077905 A 20201022